일반화학실험 아보가드로수의 결정

_SLIDE_1_ Decision of Avogadro’s number _SLIDE_2_ To derive Avogadro’s number (the number of molecules in a mole of a substance) using an oil layer on water Concepts: Avogadro`s number, mole , monolayer, molar mass, polar molecule, non-polar molecule Purpose _SLIDE_3_ Theory _SLIDE_4_ Avogadro`s number NA 〓 (6.022×1023)/ mole The number of atoms in exactly 12 grams of carbon-12 mole a chemical unit for the amount of substance. The number is set to Avogadro’s number _SLIDE_5_ Polar molecule and non-polar molecule Molecules are made up of atoms which do not always share electrons equally. Polar molecule When the atoms share electrons unequally, an asymmetry in molecular charge results Non-polar molecule When they share equally symmetry is achieved _SLIDE_6_ Because it is polar, the Carboxyl group aligns itself so that it is close the water. But, hydrocarbon chain is non-polar so it is aligned in such a way as to be far from the water. Consequently it forms …
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